After his death in 1757, his son and heir, Penyston Porlock Powney, became the Crown lessee, and was still appearing as such in records when Coworth House was constructed in 1776.

When Shepheard died about 1810, Coworth House passed to his son, also called William, whose executors sold it before 1836 to George Arbuthnot (1772–1843), a Scottish colonel who served in Madras.

He inherited Coworth House from his uncle and died there 20 August 1875 aged seventy-three, leaving a personal estate 's worn under £400,000.

[6][7] William Arbuthnot spent his formative years in India where in 1858 he married Adolphine, the second daughter of Edward Lecot, the French Consul at Madras.

It then became the home of his widow, Alice Stanley, Countess of Derby, the youngest daughter of the 7th Duke of Manchester, and a lady-in-waiting to her friend, Alexandra of Denmark.

[citation needed] In the mid-1980s, Coworth Park was acquired by Galen Weston, owner of Selfridges and Fortnum & Mason, who developed the property's first polo field.

Dorchester closed the establishment in 2008 for several years to refurbish the original Coworth House and surrounding buildings, and create a five-star resort.

[12] The property spans over 240 acres and includes facilities such as a spa, polo and equestrian grounds, stables for 30 horses, heated pool, and helicopter pad.

[3] Coworth Park was built in a Georgian architectural style featuring high ceilings, grand proportions and original period windows.

[13][14] The spa at the hotel was built to have minimum impact on the environment and was constructed partially submerged in the ground with timber and lime-hemp walls.